Can soldering machine



{No Model.) 7 '7 Sheefis-Sheet 1 J. W. ROBERTS. CAN SOLDERING MACHINE.

No. 490,126. Patented Jan. 17, 1893.

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J. W. ROBERTS. CAN SOLDERING MACHINE.

INVENTUR ATTURNEY \NITNESEES n4: Noams PEIERS ouimm'o-umon WASHI (NoModel.) 7 Sheets-Sheet a.

' J. W. ROBERTS.

CAN SOLDERING MACHINE.

No. 490,126. Patented Jan. 17, 1893.

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{No Model.) 7 Sheets-Sheet 4. J. W. ROBBRTS.

CAN SOLDERING MACHINE. No. 490,126. Patented Jan. 17, 1893.

WITNESSES I JNYENJ-UR ATIURNEY (No Model.) 7 Sheets-Sheet 5.

' J. W. ROBERTS.

CAN SOLDBRING MACHINE. No.'49.0,126. .PatentedJan. 1.7, 1393.

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(N0 Hodl.) v 7 Sheets-Sheet a.

J. W. ROBERTS.

CAN SOLDERING MACHINE.

No. 490,126. Patented Jan. 17, 1893.

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Patented Jan. 17, 1893,

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UNITED STATES JOHN WV. ROBERTS, OF CLEVELAND,

OHIO, ASSIGNOR TO THE SHERWIN- WILLIAMS COMPANY AND BENJAMIN PATTERSON,OF SAME PLACE.

CAN-SOLDERING MACHINE.

SPECIFICATION forming part of Letters Patent No. 490,126, dated January17, 1893.

Application filed January 1 7, 1891. Serial No. 378,080- (rlo model.)

To all whom it may concern:

Be it known that I, JOHN W. ROBERTS, a citizen of the United States,residing at Cleveland, in the county of Ouyahoga, State of Ohio, haveinvented certain new and useful Improvements in Can-Soldering Machines;and I do hereby declare the following to be a full, clear, and an exactdescription of my said lnvention, such as will enable others skilled inthe art to make and use said improvements in can-soldering machines.

My invention relates to machines for soldering the ends upon cans.

The object of my invention is an improve ment upon machines forsoldering ends upon cans whereby such work maybe done neatly,accurately, rapidly and economically.

With this obj ect in View, my invention consists in the details ofconstruction and combination of parts substantially as shown in thedrawings, described herein, and defined in the claims.

In thedrawings accompanying this description and forming part of myspecification, Figure 1 is a front side elevation of my solderingmachine; Fig. 2 is a rear side elevation of the same; Fig. 3 is anenlarged vertical section of Fig. 1 on the line as 11:; Figs. 4. and 5are end elevations of my said machine; Figs. 6, 7, 8, 9, 10 and 11 areenlarged detailed views of parts of my machine, and Fig. 12 is an endelevation showinga means of increasing the can heating capacity of themachine. Fig. 13 is an enlarged vertical cross-section of the machine onthe line of A A of Fig. 1e; Fig. 14 is a partial top plan view of mymachine, enlarged, and Fig. 15 is an enlarged detail view of a portionof the gas and air conducting pipes.

In all the views of the drawings, like letters and figures refer to likeparts.

In the different figures of the drawings, I is the machine bed.

- The main frame consists of the upright yoke A, which is capable ofmovementlongitudinally of the machine, as hereinafter described, and theuprights A, which are firmly fixed to the bed of the machine. Sprocketwheels, B and B, turning upon axles or shafts, b b, are carried by saidframe A and A. The

sprocket wheel B is of greater diameter than the sprocket wheel B. Thepurpose of making these sprocket wheels of different diameters will beherein explained. Around said sprocket wheels B and B travels an endlessdriver,O. This endless driver consists of open flat links, the links atevery third connection between them having a. swivel joint, 0, the linksat all other connections being joined by a lip c" encircling the end bar0 of the adjacent link. Every third link is provided with an uprightprojection 0. Of course, the number of swivel connections 0', and thenumber of upright projections c, is largely a matter of individualpreference, depending, somewhat, upon the size of the machine and thesize of the cans to be soldered.

I have given what I consider the best arrangement of links and uprightprojections for the endless driver. At suitable intervals along the saidendless driver I provide crossbars 0', which are preferably madeintegral with the links of the driver.

D D, D" D ,and D D", constitute the track supporting frame. Said tracksupporting frames D, D" and D which support the upper lap of track, eachhave a downwardly slanting arm, cl, d" and d, to the upper side of whichare attached the brackets c e The track supporting frames D, D and Dwhich support the lower lap of track, each have upwardly inclined arms,d, d and (1 to the under side of which are attached the brackets e ande*. The track begins at the feed end of the machine and extends alongthe upper lap of the endless driver G to the opposite end of themachine, around the sprocket wheel B, and back with the lower lap ofsaid endless driver 0 to the feed end. The track consists substantiallyof four rails. The rails E and E are supported from the bent arms d, dand d on the upper lap, and from the bent arms d d and d on the lowerlap in close proximity to the endless driver 0, and said endless drivertravels between said rails, which keeps it from material lateralswinging motion. Said rails E and E are below the cross-bars C of theendless driver of the upper lap, and are above said cross-bars G on thelower lap of the endless driver.

To the brackets e is attached a rail F above thecross-bars O of theendless driver on its upper lap. Said rail extends from the feed end ofthemachine to thetrack frameD. The rail F is held above the cross bars Oon the upper lap of the endless driver by means of laterallyprojectingracks f which pass through openings 6 of the brackets e. Through saidbrackets e, lengthwise of the machine, there extends a rod K carryingpinions it which mesh with said racks f. The outer end of said rod K issupported by an arm or brace aprojecting from the main frame A. A handwheel .K serves to turn said rod K, and thus adjust the rail Fthroughthe pinions k and racks f, to the length of cans being soldered. Saidrail F extends from the feed end of the ma- G and G extend from theframe D to the feed end of the machine.

Corresponding with the track railsF'G and F G arethe bent rails H and Houtside the sprocket wheel B, inside of which rails travel thecross-bars C as the endless driver 0 passes over said sprocket wheel B.The railsF, H

r and G, and F, H and G, make a continuous guide outside thecross-barsO, and substan' tially correspond with theinnerrails E and E of thetrack. The bent rail H has a lateral adjustment by means of theprojecting rods h, which pass through holes in the frame L and the bracea Set screws h secure the rail H at any adjustment by holding the rods hfirmly. Below the lower track is placed a platform J. Above saidplatform are two guide rails G2 and G The rail G2 is firmly fixed to themovable part of the frame which supports the platform. The rail G hasadjustment horizontally to said platform by means of the rack g andpinion f upon the rod F which is operated by the hand Wheel F Upon thebed I of the machine stand the platform supports M. To the upperhorizontal part of the support M is fixed a plate M. A guide rod Mextends from the upper part of the support M to its bottom. A yoke, P,having its open end up, works vertically upon the guide rod MHorizontally from the lower portion of the yoke is an extension P, towhich is fixed firmly a vertical screw 19 which passes up through asmooth bore in the plate M. Upon this screwis a pinion 10 having acentral bore threaded internally to screw upon the screw 19. The outsideof the pinion p is toothed to mesh with the worm gear P keyed upon theshaft P The platform J is supported upon the yoke P. By

L is a frame which straddles the machine tracks, and is designed toafford a means of attachment for the top end of the clamp N.

able vertically by means of the screw S projecting from the clamp upthrough the frame I L, and the thumb-nut s. The guide rods R; R,projecting from the clamp N vertically through bearings in said frame Lprevent the clamp twisting about.

To the lower side of the lower end of the clamp N is a pin nlwhichpasses through the slotj in the platform J, and to which'pin n isattached one end of the coil spring 0 which has its opposite endattached to the bottom of the platform J at o, as shown. Thisarrangement allows a sufficient yielding of the clamp to adapt itself tocans as they pass under it.

A brace a, from the frame A supports the feed-way T, having guide-railst, t, one of which, 25, has lateral adj nstment on the feed- Way bymeans of the lateralrod t and the set screws t" so that it may beadjusted to the The upper'end of said clamp is madeadjustvarious lengthsof:caus to be soldered. The

feed-wayT should be inclind to themachine so that cans will roll downit. From the brace a projects'an arm U having its inner end turned up tosupport the swinging trap upon the rod 4;. The. trap should be heavyenough to keep cans from passing under it till pushed under by theuprightprojectionsc on the endless driver.

By reference to the drawings (Figs. 1, 2, 3, at and 5) it will be seenthat the upper lap of track and endless driver incline laterally in onedirection from a horizontal plane, While the lower lap inclineslaterally to the opposite direction; and that the tracks are so arrangedas that the endless driver has no lateral inclination as it passesaround the sprocket wheels B B. The platform J below the lower lap oftrack has the same lateral inclination as said lap of track from theframe L to the frame D while beyond these frames the platform issubstantially level. The purpose of so laterally inclining the laps oftrack and driver in opposite directions is to keep the cans on one angleof inclination from a horizontal plane as they are carried in onedirection by the machine, and to keep them inclined to the oppositedirection as they are carried back. By making the sprocket wheel B ofgreater diameter than the sprocket wheel B, and placing the axialcenters of said wheels in the same plane, the track and endless driverWill be upwardly inclined from the feed end of the machine on the uppersection, and they will be upwardly inclined to the feed end on the lowersection of the machine. This is the preferred construction;

I00 and the set screws it, which hold the rod 1) of the trap firm. Saidswinging trap V turns though the lower lap is illustrated assubstantially level from end to end, because of the necessarily smallscale of the drawings. Between the track frames L and D the platform Jshould have the same horizontal and longitudinal inclination that isgiven to the lower lap of track and endless driver. Outside of saidframes the platform is substantially level, as herein-before described,and the discharge end J may be given a slight declination so that thecans will roll away readily. The rail F, which, besides holding down theends of the cross-bars C on one side of connected with asouree of gassupply and run along the lower edge of the travel of the cans a part ofthe length of the machine. WV is a pipe which runs along the lower edgeof the upper lap of track to the point marked The horizontal part of thepipe has perforations '10. On the underside of the horizontal part ofsaid pipe W is an opening w. Gas

4 is admitted through the pipe TV. The gas is lighted and the jets fromthe perforations to burn against the lower edge of the can as it isrolled over the flame. The entrance of air at the opening 20' and itsmingling with the gas makes a blue flame, which is known to i andunderstood by persons skilled in the art.

A valve y controls the admission of gas into the pipe. A similar pipe,W, at the opposite end of the machine, and having like perforations inthe upper side of its horizontal part, carries a blast of cold air tothe cans upon that part of the track, and cools the cans that havepassed over the flame from the pipeW. A valve Y controls the admissionof air thereto.

At the lower edge of the platform J I place a gas pipe W havingperforations w and an air opening 10 like that described for the upperlap of track. Said gas conducting pipe also extends but a part of thelength of the machine, and a cold air pipe W like the one for the upperlap of track, and having like perforations for carrying cold air to thecans, is provided. The admission of gas to the pipe W is regulated bythe valve 11 and the blast of cold air through the pipe, W is regulatedby the valve y the same as with the other pipes and valves described.

I have provided for tightening and slackening the endless driver 0, sothat it may be placed upon or taken off the sprocket wheels B B, and tofacilitate the making of needed repairs thereto. I

The frame A, which supports the smaller sprocket wheel B, is notattached to the machine bed I.

To the bed I is fixed a plate 5 forming ways or guides for the plate 6.To the plate 6 is secured a plate 7, which is firmly fixed to the frameA. The ways 5 are held down by means of screws 8. The two plates aresecured together by screws 9. Screws 10 secure the plate '7 to the frameA. A slot 6' is made in the plate 6, through which a screw 5 passes intothe guide plate 5 to prevent the plate 6 from lifting up. A screw 11passes through a'loop 12 attached to a cross-bar 15 on the guide plate 5and screws into its counterpart 13 forming part of the plate 6. Thescrew isoperated by the hand wheel 14. It will be seen that by turningthe screw 11 as stated the frame A may be drawn back or pushed forward,which will tighten or slacken the endless driver 0.

Z, Z represent cans at different places as operated upon by the machine.

Power may be communicated to the machine by any known means. The meansshown consists of a drive pulley I mounted upon the shaft 2 which has aworm gear 3 meshing with a pinion a that is keyed upon the end of theshaft b.

Having given a full, clear, and an exact description of my machine, Iwill now describe its operation. The difierent guide rails t, F, H, andG, and the platform J and the clamp N are first adjusted to the size ofcans to be soldered. The cans Z are placed upon the inclined feed-way T,and roll down against the swinging trap V. As the endless driver 0travels along, the upright projection 0 push the cans under the swingingtrap upon the upper track. The required amount of solder and flux forone end of the can is then placed in it. This may be done by hand, or byother known means. As the endless driver travels 'its course, theupright projectionsc cause the cans to roll along upon the rails E E ofthe upper lap of track and upon the platform J below the lower lap oftrack. As the cans roll upon the upper section of the machine inproximity to the perforated gas pipe W, the joint to be soldered isheated, the solder within the can melts, and as the cans are rolled inan inclined position the melted solder runs into the joint at allpoints. Having passed over the flame from the gas pipe W, the cans rollon continuously over the cold air pipe NV and are cooled. The cans thencontinue their travel around the sprocket wheel B, and are kept fromfalling from the endless driver by means of the clamp N. When the canscome upon the platform J they incline oppositely from what they did uponthe upper section of the machine. Solder and flux for the top end of thecan are put into the can through the opening in the can top just beforethe cans leave the upper lap of track to pass under the clamp N. On thefirst half of its travel over the platform, J, the joint is sub- IIObent in such 'manne'ras'to insure the passage jected to heat from thegas pipe W and on the second half of its travel over the platform J itis subjected to a cold air blast from the pipe W It will be seen thatthe bottom ends of the cansare soldered and cooled upon the uppersection of the machine, and that the tops fof the cansare' solderedandjcool'e'd upon thelower section of the machine. The cans, having beensoldered, roll out of the way on the projeotingend J of the platform.

There is a great advantage in rolling the cans continuously, after beingsoldered, over a cold airbla'sttillthe cans are cooled, as the cansarenot disturbed in 'an'ymanner till the solder is firmly set.This'prevents the 'sol- 'der from setting unevenly, and saves" leaksinthe soldered joint. Itwill be seen that the swivel'en' links of theenmes driverallouiit "to runat different'angles ofinclinationupon theupper and lower sections of thejniachi'ne, and to; pass easily over thesprocket wheels B B'." At the feed end or t e machine the ends of therails E E'and F F" are slightly offthe cr'oss bars C between the twopairs of rails. The inclination of the cans, as' each end issoldered,causes the melted solder to run to the joint, as that is thelowest point.

The longitudinal inclination'of theupper'and lower sections'of themachine cause the cans to berolled upin'clines, which keeps the cans 7against the 'uprightprojections 0, so that they will not roll toorapidly at some placesand then stop till driven again bythe uprights c.

Fig112 of the drawings illustrates amea'ns of extending and increasingthe heating capacity of the machine when used in solderin g large cans.O n large cans any point 'in the joint to be soldered may be so long inmaking a revolutionthat it willnot remain hot while the processas'soldering is going on if heat is and modifications and I do not,therefore,

limit myself to the particular formand arrange'ment of parts shown anddescribed.

What'l claim as my invention and desire to secure by Letters Patentis 1. The combination, in a machine of the character described, of anendless driver consisting of a link chain, a part of the links havingswivel connection and a part of the links having upright projections,cross-bars at intervals upon said endless driver, and a track consistingof two pairs of rails, one pair of the rails being above and the otherpair of rails being below the projecting ends of the cross-bars, wherebythe endless driver is kept in line and at fixed angles of inclination,the

track along the upper lap of the endless driver being adapted "to havecans rolled thereon. substantially as shown anddescribed.

2. The combination, inn machine of the character described, ofsprocketwheels, an endless driver 'to" travel "over" the sprocket wheel's,cross-bar's upon the" endless driver, a

main frame to support thesprocket wheels, said' main "-f'rame havingadjustment'longitudinally of the machine to 'sla'cken and tighten theendless driver, and a track consisting of four rails, two of the railsbeing to the outside andtwo to th'e inside of the crossbarsupon theendless driver, the track along the upper lap of the-endless driverbeing adapted to'have cans'rolled thereon. substantiallyias shownanddescribed.

" 3. The combination, 'ina machine of the characterdescribed,"ofsprocket wheels, an endlessdriv'er to travel'over'the sprocket wheels,cros's barsupon'the 'endl'ess'driver, a main-frame havin g adj ustme'nii longitudinally ot the machine to tighten and'slacken the endlessdriver, a track consisting of four'rails,

two of, the rails being to" the outsideand two to the inside of' thecross-bars on the endless driver, the track "along the upper lap of theendless driverbeing adapted to have cans rolled thereon. aperforatedpipe along one edge of the'upper lap of'traek, and aperforated pipe along the lower edge of the lower track,

substantially asshown and described, M 4:.Thecombination, in a machineof the character described, of sprocket 4 wheels, an

e'ndlessdriver which travels over thesprocket which is larger than. theother, an endless driver having cross-bars'thereon to travel over thesprocket wheels, a track extending the length offboth the upper and thelower laps of said endless driver and around the outside of one of thesprocket wheels, the track consisting of four rails, two of which railsare to the outside and two to the inside of the crossbars upon theendless driver, the track and endless driver having opposite lateralinclination on their upper andlower laps, substantially as shown anddescribed.

6. The combination, in a machine for soldering'cans, of two sprocketwheels one of which is larger than the other, an endless driver totravel over the sprocket wheels, a track extending the length of boththe upper lIO and the lower laps of the endless driver, the track andthe endless driver having a fixed lateral inclination on their upper lapand an opposite lateral inclination on their lower lap, with avertically adj ustahle platform below the lower lap of the endlessdriver, the platform having the same lateral inclination as the lowerlap of the endless driver and track, and means for sustaining cansagainst the carrier in their travel over one of said sprocket wheels,substantially as shown and described.

7. The combination, in a machine of the character described, of anendless driver, a clamp to sustain cans at one end of the machine, witha frame to support the upper end of the clamp, a screw projecting fromthe clamp up through the frame, a nut upon the screw, guide rodsprojecting from the clamp vertically through hearings in the frame toprevent the clamp from twisting, and a spring fixed to the lower end ofthe clamp to allow a yielding of the clamp, substantially as shown anddescribed.

8. The combination, in a machine of the character described, of anendless driver, a platform, guide-rails upon the platform, one of saidrails having horizontal adjustment, yokes to support the platform,guides for the yokes, vertical screws fixed to the yokes, and pinionsupon the screws. to give the platform vertical adjustment, substantiallyas shown and described.

9. The combination, in a machine of the character described, of anendless driver, a clamp to sustain cans at one end of the machine, aframe to support the upper end of the clamp, a screw projecting from theclamp vertically through said frame, a nut upon the screw, a platformhaving vertical adjustment, and a spring having one end attached to saidclamp and the opposite end attached to said platform, substantially asshown and described.

10. The combination, in a machine of the character described, of anendless driver, a clamp to sustain cans at one end of the machine, aframe to support the upper end of the clamp, a screw projecting from theclamp through said frame and a nut upon the screw to give the clamp adjnstment, a platform having vertical adjustment, guide rails upon theplatform, one of which rails has horizontal adjustment, and a springhaving one end attached to the clamp and the opposite end attached tothe platform, substantially as shown and described.

11. The combination, in a machine of the character described, ofsprocket wheels, an endless driver having cross-bars traveling over thesprocket wheels, a track consisting of four rails two of which are tothe inside and two to the outside of the cross-bars of the endlessdriver, and an adjustable yielding clamp to sustain cans against thetrack as they travel around the sprocket wheel at one end of themachine, substantially as shown and described.

12. The combination, in a machine of the character described, ofsprocket wheels, an endless driver to travel over the sprocket Wheels,cross-bars at intervals on the endless driver, a track consisting offour rails, two of said rails being to the outside and two to the insideof the cross-bars upon the endless driver, and a clamp, a frame tosupport the upper end of the clamp, a screw projecting from the clampthrough said frame and a nut upon the screw to give the clamp adjustment, and a spring attached to the lower end of the clamp to allowthe clamp to yield to adapt the clamp to cans passing under it,substantially as shown and described.

13. The combination, in a machine of the character described, ofsprocket wheels, an endless driver to travel over the sprocket wheels,cross-bars upon the endless driver, a track consisting of four rails,two of the rails being to the outside and two to the inside of thecross-bars, a platform below the lower lap of the track, the platformbeing supported by yokes, guides for the yokes, vertical screws fixed tothe yokes, threaded pinions upon the vertical screws to give theplatform vertical adjustment, and ayielding adjustable clamp, having itsupper end connected with a frame and its lower end connected with the adjustable platform. substantially as shown and described.

14. The combination, in a machine of the character described, ofsprocket wheels, an endless driver to travel over the sprocket wheels,cross-bars upon the endless driver, a track consisting of four rails,twoof the rails being to the outside and two to the inside of thecross-bars, a platform below the lower lap of track, said platformhaving vertical adjustment, a clamp, a frame to support the upper end ofthe clamp, a screw projecting from the upper end of the clamp throughsaid frame to give it adjustment, and a spring having one end attachedto the clamp and the other end attached to the platform, to allow ayielding of the clamp, substantially as shown and described.

15. The combination, in a machine of the character described, ofsprocket wheels, an endless driver to travel over the sprocket wheels,cross-bars upon the endless driver, a track consisting of four rails,two of the rails being to the outside and two to the inside of thecross-bars, a platform, yokes to support the platform, guides for theyokes, vertical screws fixed to the yokes, threaded pinions upon thevertical screws to give the platform vertical adjustment, a clamp, aframe to support one end of the clamp, a screw projecting from the clampthrough said frame to give the clamp adjustment, and a spring having oneend attached to the clamp and the opposite end attached to the platformto allow ayielding of the clamp, substantially as shown and described.

16. The combination, in a machine of the character described, of amain-frame having longitudinal adj ustment, sprocket wheels supported bythe main-frame, an endless driver to travel over the sprocket wheels,cross-bars upon the endless driver, a track consisting of four rails,two of the rails being to the outside and two to the inside of thecross-bars of the endless driver, and an adjustable yielding clamp tosustain cans as they travel under the clamp, having its upper endattached to a frame above the machine and its lower end attached to aplatform below the machine. substantially as shown' and described.

17. The combination, in a machine of the character described, of amain-frame having longitudinal adjustment, sprocket wheels supported bythe main-frame, an endless driver to travel over the sprocket wheels,cross-bars upon the endless driver, a track consisting of four rails,two of the rails being to the outside and two to the inside of thecross-bars on the endless driver, and a clamp, a frame to support theupper end of the clamp, a screw projecting from the clamp through saidframe and a nut upon the screw to give the clamp adjustment, and aspring attached to the lower end of the clamp to yield to adapt theclamp to cans as they pass under it, substantially as shown anddescribed.

18. The combination, in a machine of the character described, of amain-frame having longitudinal adjustment,sprocket wheels supported bythe main-frame, an endless driver to travel over the sprocket wheels,cross-bars upon the endless driver, a track consisting of four rails,two of the rails being to the outside and two to the inside of thecross-bars upon the endless driver, a platform below the lower lap ofthe track, the platform being supported by yokes, guides for the yokes,vertical screws fixed to the yokes, threaded pinions upon the verticalscrews to give the platform vertical adjustment, and an adjustableyielding clamp, having its lower end connected with the platform and itsupper end connected with a frame above the machine. substantially asshown and described.

19. The combination, in a machine of the character described, of amain-frame having longitudinal adjustment, sprocket wheels supported bythe main -frame, an endless driver to travel over the sprocket wheels,cross-bars upon the endless driver, a track consisting of four rails,two of the rails being to the outside and two to the inside of thecross-bars upon the endless driver, a platform below the lower lap oftrack, said platform having vertical adjustment, a clamp,a frame tosupport the upper end of the clamp, a screw projecting from the upperend of the clamp through said frame anda nut upon the screw to give theclamp adjustment, and a spring having one end attached to the clamp andthe other end attached to the platform to allow a yielding of the clamp,substantially as shown and described.

20. The combination, in a machine of the character described, of amain-frame having longitudinal adjustment, sprocket wheels supported bythe main -frame, an endless driver to travel over the sprocket Wheels.cross-bars upon the endless driver, a track consisting of four rails,two'of the rails being to the outside and two to the inside of thecross-bars of the endless driver, a platform, yokes to support theplatform, guides for the yokes, vertical screws fixed to the yokes,threaded pinions upon the vertical screws to turn to give the platformvertical adjustment, a clamp, a frame to support the upper end of theclamp, a screw projecting from the clamp through said frame and a nutupon the screw to give the clamp adjustment, and a spring having one endfixed to the clamp and the opposite end fixed to the platform to allow ayielding of the clamp, substantially as shown and described.

21. The combination, in a machine of the character described, of amain-frame having longitudinal adjustment, sprocket wheels supported bythe main -frame, an endless driver consisting of alink chain havingswivel connections and upright projections to travel over the sprocketwheels, cross-bars upon the endless driver,a track adapted to sustainthe endless driver at one angle of inclination on its upper lap and atanopposite angle on its lower lap, a vertical adjustable platform belowthe lower lap of the endless driver and having substantially the sameinclination, guide rails along the upper lap of track and guide railsalong the platform, an adjustable yielding clamp, a perforated pipealong the lower edge of the upper lap of track, a perforated pipe alongthe lower edge of the platform, and a feedway, substantially as shownand described.

In testimony whereof I afiix my signature, in the presence of twowitnesses, this 15th day of January, 1891.

JOHN XV. ROBERTS.

'Witnesses:

J O. BEARDSL'EE, Jos. A. OSBORNE.

IIO

